Business Segments - Schedule of Information on Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 712,019	$ 581,113	$ 2,050,002	$ 1,736,824
Operating income (loss)	161,185	131,213	474,988	381,748
Interest expense	9,498	10,642	31,479	33,958
Other expense (income) - net	630	(704)	16,957	7,321
Income before income taxes	151,057	121,275	426,552	340,469
Total assets	4,854,579		4,854,579		$ 4,414,398
Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	(671)	(908)	(3,007)	(2,297)
Corporate office and other
Segment Reporting Information [Line Items]
Operating income (loss)	(17,335)	(14,204)	(59,866)	(48,902)
Total assets	336,685		336,685		559,374
Fluid & Metering Technologies
Segment Reporting Information [Line Items]
Net sales	251,297	220,553	745,202	666,187
Operating income (loss)	69,020	58,402	195,384	176,111
Fluid & Metering Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	0	194	737	533
Fluid & Metering Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	251,297	220,747	745,939	666,720
Total assets	1,563,000		1,563,000		1,387,067
Health & Science Technologies
Segment Reporting Information [Line Items]
Net sales	301,637	219,671	825,440	658,361
Operating income (loss)	70,374	49,912	212,987	150,562
Health & Science Technologies | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	650	707	2,228	1,744
Health & Science Technologies | Operating segments
Segment Reporting Information [Line Items]
Net sales	302,287	220,378	827,668	660,105
Total assets	2,128,510		2,128,510		1,576,093
Fire & Safety/Diversified Products
Segment Reporting Information [Line Items]
Net sales	159,085	140,889	479,360	412,276
Operating income (loss)	39,126	37,103	126,483	103,977
Fire & Safety/Diversified Products | Intersegment elimination
Segment Reporting Information [Line Items]
Net sales	21	7	42	20
Fire & Safety/Diversified Products | Operating segments
Segment Reporting Information [Line Items]
Net sales	159,106	$ 140,896	479,402	$ 412,296
Total assets	$ 826,384		$ 826,384		$ 891,864